新SAT官方指南阅读第十篇全解析
This passage is adapted from Geoffrey Giller,“Long a Mystery,How500-Meter-High Undera Waves Form Is Revealed.”©2014by Scientific American.如何注销微信
Some of the largest ocean waves in the world are nearly impossible to e.Unlike other large waves,the rollers,called internal waves,do not ride the ocean surface.Instead,they move
underwater,undetectable without the u of satellite imagery or sophisticated monitoring
equipment.Despite their hidden nature,internal waves are fundamental parts of ocean water
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dynamics,transferring heat to the ocean depths and bringing up cold water from below.And they can reach staggering heights—some as tall as skyscrapers.
Becau the waves are involved in ocean mixing and thus the transfer of heat, understanding them is crucial to global climate modeling,says Tom Peacock,a rearcher at the Massachutts Institute of Technology.Most models fail to take internal waves into account.“If 10手机怎么解压文件
we want to have more and more accurate climate models,we have to be able to capture process such as this,”Peacock says.鬼的故事
Peacock and his colleagues tried to do just that.Their study,published in November in Geophysical Rearch Letters,focud on internal waves generated in the Luzon Strait,which
parates Taiwan and the Philippines.Internal waves in this region,thought to be some of the
largest in the world,can reach about500meters high.“That’s the same height as the Freedom
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Tower that’s just been built in New York,”Peacock says.
Although scientists knew of this phenomenon in the South China Sea and beyond,they didn’t know exactly how internal waves formed.To find out,Peacock and a team of rearchers from
M.I.T.and Woods Hole Oceanographic Institution worked with France’s National Center for
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Scientific Rearch using a giant facility there called the Coriolis Platform.The rotating platform, about15meters(49.2feet)in diameter,turns at variable speeds and can simulate Earth’s rotation.
It also has walls,which means scientists can fill it with water and create accurate,large-scale
simulations of various oceanographic scenarios.
Peacock and his team built a carbon-fiber resin scale model of the Luzon Strait,including the 25宁愿
islands and surrounding ocean floor topography.Then they filled the platform with water of
varying salinity to replicate the different densities found at the strait,with denr,saltier water
below and lighter,less briny water above.Small particles were added to the solution and
illuminated with lights from below in order to track how the liquid moved.Finally,they re-created tides using two large plungers to e how the internal waves themlves formed.
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The Luzon Strait’s underwater topography,with a distinct double-ridge shape,turns out to be responsi
ble for generating the underwater waves.As the tide ris and falls and water moves
through the strait,colder,denr water is pushed up over the ridges into warmer,less den layers above it.This action results in bumps of colder water trailed by warmer water that generate an
internal wave.As the waves move toward land,they become steeper—much the same way
张学良简历35
waves at the beach become taller before they hit the shore—until they break on a continental shelf.
The rearchers were also able to devi a mathematical model that describes the movement and formation of the waves.Whereas the model is specific to the Luzon Strait,it can still help rearchers understand how internal waves are generated in other places around the world.
Eventually,this information will be incorporated into global climate models,making them more 40
accurate.“It’s very clear,within the context of the[global climate]models,that internal waves play a role in driving ocean circulations,”Peacock says.
43.The first paragraph rves mainly to
菊花鸡A)explain how a scientific device is ud.
B)note a common misconception about an event.
C)describe a natural phenomenon and address its importance.
D)prent a recent study and summarize its findings.
正确答案：C
分析：文章第一个段落，作者介绍了一种现象叫内部波浪（internal waves），而且解释了它们为什么重要。
44.As ud in line11,“capture”is clost in meaning to
A)control.
B)record.
抱养
C)cure.
D)absorb.
正确答案：B
分析：文章当中，研究者Tom Peacock认为，为了创造准确的全球气候模型，科学家必须有能力记录内部波浪的形成过程。Capture在这是记录的意思。
45.According to Peacock,the ability to monitor internal waves is significant primarily becau
A)it will allow scientists to verify the maximum height of such waves.
B)it will allow rearchers to shift their focus to improving the quality of satellite images.
C)the study of wave patterns will enable regions to predict and prevent coastal damage.
D)the study of such waves will inform the development of key scientific models.
正确答案：D
分析：文章中，Tom Peacock认为科学家需要记录内部波浪形成过程可以发展更加准确的气候模型。
46.Which choice provides the best evidence for the answer to the previous question?
A)Line1(“”)
B)Lines2-4(“quipment”)
C)Lines9-11(“If...this”)
D)Lines14-15(“high”)
正确答案：C
分析：见45题解释。
47.As ud in line36,“devi”most nearly means
A)create.
B)solve.
C)imagine.
D)begin.
正确答案：A全国中小学生
分析：在35-37行，作者提到Tom Peacock和他的团队能够创造（devi）一种数学模型，这种数学模型可以描述内部波浪的形成和运动。
48.Bad on information in the passage,it can reasonably be inferred that all internal waves
A)reach approximately the same height even though the locations and depths of continental shelves vary.
B)may be caud by similar factors but are influenced by the distinct topographies of different regions.
C)can be traced to inconsistencies in the tidal patterns of deep ocean water located near islands.
D)are generated by the movement of den water over a relatively flat ction of the ocean floor.
正确答案：B
